Rebound-preventing device for gas-engines.



PATBNTED AUG. '11, 1903.

0. SGHROTZ. I REBOUND PREVENTING DEVIGE-FOR/GAS ENGINES.

APPLIUATIOH FILED NIB. 7. 1901.

I0 MODEL.

WITNESSES UNITED STATES Patented August 11, 1903.

PATENT OFFICE.

CARL SOHROTZ, OF COLOGNE, GERMANY.

SPECIFICATION forming part of Letters Patent No. 735,912,dated August11, 1903.

Application filed February "7, 1901. serial No. 46,341. (No model.)

tion, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to an improved apparatus that is to be insertedinto the pipe admitting gas to a gas-engine and whereby the t pressurein the neighboring pipes is rendered more nearly equable and theflickering of flames fed by the same is prevented The apparatus consistsof a return-valve preferably arranged within a chamber con-" nected withthe admission-pipe.

Of the accompanying drawings, Figure 1 is a longitudinal section, andFig. 2 a cross-see tion on line 00 y in Fig. 1, of the preferredconstruction of the herein-described appa- 2 5 ratus.

The same letters of reference indicate the same parts in both figures. I

In the drawings, M is a gas-pipe supposed to be connected with thegas-main, and F is the gas-engine and admitting gas to the same.

Between both pipes is placed the air-tight chamber 0, preferably made inthe shape of a cylinder. Within this cylindrical'chamber and closelyfitting one end of the same is placed the circular flange B, with a studS in its center. The st'ud S, I prefer to cut off obliquely, as shown inthe drawings. I further provide a flat lid or cover V, suitably hingedat one end, which partly by its own weight and partly by the action ofthe spring N is normally pressed against the edge of the stud S.

In order to secure tight closing of thelid a feed-pipe supposed to beconnected with The pressure of the spring N can be adjusted by means ofthe screw 0, which passes through the wall of the chamber C, and there-:fore remains accessible at all times. t

1 The operation of the herein-describedapparatus is as follows: \Vhenthe engine begins to suck, a certain reduction of pressure in thechamberC will precede the lifting of the cover V. The'spring N ought to beadjustedin such. a Way that. the difference of pressure on both sides ofthe lid V is merely 6o sufficient to lift it very slightly, and thus awider opening of the valve is only effected when the inertia of thestream of gas has accumulated. When the period of suction has attainedits end and the cut-on? valve of the engine has closed,-the flow of thegas will still continue for ashort time until the increasing pressure inthe chamber 0 gradually stops it. At this period, however, the lid V,being subjected to the pressure of the spring N,besides the gas-pressurein chamber G,will close before the pressure in O has increased to thefull amount of the pressure in Maud will thereby prevent a rebound ofthe gas, which otherwise usually is effected by the congestion ofthe gasin admission-pipes to gas-engines. It will readily be seen that theaction of my apparatus is regulated not only by the pressure of thespring N, but also by the capacity of the chamber 0, and since the gasinclosed in the feed-pipe F will add its cushion action to that of thegas in the chamber O the size of the latter can be varied according tothe length of the feed-pipe, and where the feed-pipe is sufficientlylong the chamber 0 might be omitted altogether without altering thenature of my invention. Likewise if instead of having a sufficientlylong feed-pipe an elastic reservoir were pro vided in the feed-pipesuchas, for instance, the rubber bag usually employed for the purpose-thesame result would be obtained.

- Having now particularly described and as-' certained the nature of mysaid invention and in what manner thesame is to be performed,

-I declare that what I claim is.

An apparatus for preventing the rebound of gas in the feed-pipe ofgas-engines, consisting of a chamber arranged in the feedtion withexteriorly-operabie means for regupipe, said feed-pipe, where itdischarges into lating the pressure of the spring upon the lid. 10 thechamber, being formed in the shape of In testimony whereof I haveaffixed my an obliquely-truncated stud having its dissignature inpresence of two witnesses.

charge substantially in line with the How of CARL SCHROTZ.

the gas through said feed-pipe, a hinged lid Witnesses:

closing the oblique mouth of said stud, and CHARLES LE SIMPLE,

a spring bearing upon said lid, in c-oinbina- KARL SCHMITT.

